{"product_id":"465-viton-o-ring-75a-durometer-18in-id-18-1-2in-od-reliable-seal","title":"465 Viton O-Ring 75A Durometer 18in ID 18-1\/2in OD - Reliable Seal","description":"\u003cp\u003eIn this review the 465 Viton O-ring is evaluated for users who need a single, high-temperature and chemical-resistant seal. The bottom line is simple: this black, round Viton O-ring is best for applications that demand heat, fuel and chemical resistance where exact sizing matters. It performs as a direct replacement for common fuel bottle and barrel seals and is built to resist leaks and degradation in demanding environments, making it a practical pick for technicians and hobbyists who need dependable sealing rather than a general-purpose elastomer.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made from Viton fluorocarbon elastomer to provide strong resistance to fuels, oils and many aggressive chemicals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for use from -15 degrees F to 400 degrees F so it holds up under high heat and cold conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness gives good resistance to penetration and maintains shape under compression for consistent sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works with non-flammable hydraulic fuels, silicone oil, chlorinated and aromatic hydrocarbons, propane and vacuum applications, reducing the risk of chemical attack in those systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and size:\u003c\/strong\u003e Round cross-section with an 18in inner diameter and 18-1\/2in outer diameter that provides a reliable seal between overlapping cylindrical surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Manufactured to meet the AS568A sizing standard so it fits common equipment that uses that specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at professionals and informed DIYers who need a replacement seal for fuel systems, hydraulic fittings, firearms components or industrial assemblies where Viton compatibility is required. It is particularly useful for applications that see heat, fuel exposure or require ozone and weathering resistance.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for systems exposed to low molecular organic acids, ammonia gas, strong alkalis, amines, glycol-based brake fluids or super-heated steam, so users working primarily with those media should select a different elastomer that resists those specific chemicals.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent chemical and fuel resistance for reliable service in exposed environments.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature window suitable for high-heat and low-temperature use.\u003c\/li\u003e\n\u003cli\u003eAccurate sizing and 75A hardness that customers report fit and function well as replacements for specific equipment.\u003c\/li\u003e\n\u003cli\u003eDurable material that resists ozone and weathering, helping prevent premature failure outdoors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot compatible with certain chemistries such as ammonia, strong alkalis, some amines and glycol-based brake fluids, limiting use in those systems.\u003c\/li\u003e\n\u003cli\u003eSingle pack sizing requires users to confirm exact dimensions before purchase to avoid fit issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eViton (fluorocarbon elastomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer (hardness)\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter\u003c\/td\u003e\n\u003ctd\u003e18 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter\u003c\/td\u003e\n\u003ctd\u003e18-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F to 400 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 465 Viton O-ring is a practical, cost-effective choice for anyone needing a single high-temperature, fuel- and chemical-resistant seal in standard AS568A sizing. Its 75A hardness and precise dimensions make it a dependable replacement for fuel bottle seals, barrel seals and similar applications, delivering solid leak resistance and service life when used with compatible fluids.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for fuel systems?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels and aromatic hydrocarbons, making this O-ring suitable for many fuel system applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures can it tolerate?\u003c\/strong\u003e\u003cbr\u003eThe material is rated from -15 degrees F to 400 degrees F, covering most high-heat and low-temperature use cases.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre there fluids to avoid?\u003c\/strong\u003e\u003cbr\u003eAvoid low molecular organic acids, ammonia gas, strong alkalis, amines and glycol-based brake fluids, as Viton is vulnerable to those chemistries.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48254219714779,"sku":"B000FMWQIW","price":40.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_1b95c88e-5aeb-4f75-b744-2ab0f18e74cd.jpg?v=1778265874","url":"https:\/\/gearmusthave.com\/products\/465-viton-o-ring-75a-durometer-18in-id-18-1-2in-od-reliable-seal","provider":"GearMustHave","version":"1.0","type":"link"}